Is the Stainless Steel MKV Sealing Ring for TW Coupling DIN 28450 suitable for steam or liquefied gas applications?

The Stainless Steel MKV Sealing Ring for TW Coupling DIN 28450 is NOT suitable for steam or liquefied gas applications. The product description explicitly excludes liquefied gas and steam. Its rated operating range is -0.8 bar to 16 bar and -20°C to +65°C (depending on medium and sealing material), and it uses a hypalon joint seal and PTFE thread sealing—configurations that do not permit safe use with steam or liquefied gases.

Can the Stainless Steel MKV Sealing Ring for TW Coupling DIN 28450 be used with abrasive or particulate-laden fluids without accelerated wear or seal damage?

Stainless Steel MKV Sealing Ring for TW Coupling DIN 28450 Format can handle some abrasive or particulate-laden fluids, but with caveats. The AISI 316 construction gives good overall corrosion and wear resistance, and the robust hypalon (GSD) joint seal plus PTFE (GD) thread sealing provide durable, leak-resistant performance. However, hypalon and PTFE seals can be worn by heavy, sharp, or highly abrasive solids over time. Particulates can abrade sealing surfaces and seating faces, accelerate wear, and eventually compromise tightness—especially under higher pressures, turbulent flow, or repeated coupling cycles. Recommendation: for continuous exposure to abrasive or particulate-laden media, inspect and maintain seals more frequently, consider protective measures (filtration, strainers, flow control to reduce turbulence), or evaluate alternative seal materials and designs specifically rated for abrasive service. For intermittent or low-solid-content particulate transfer, the Stainless Steel MKV Sealing Ring for TW Coupling DIN 28450 Format will likely perform acceptably with routine inspection.

Stainless Steel MKV Sealing Ring for TW Coupling DIN 28450

Additional information

Material	SS – stainless steel

The MKV sealing ring with BSP internal thread is a precision-engineered component designed for TW transfer connections, working in combination with the MKH closing ring to create a secure and reliable MK connection. Manufactured in compliance with EN ISO 14420-6 (formerly DIN 28450), it ensures consistent performance and safety across a wide range of applications. Crafted from durable AISI 316 stainless steel, the ring offers excellent resistance to corrosion and demanding operating conditions. Suitable for transferring liquids, bulk materials, and gases (excluding liquefied gas and steam), it operates effectively within a pressure range of -0.8 bar to 16 bar and a temperature spectrum from -20°C to +65°C, depending on the medium and sealing material. The joint sealing is provided by a robust hypalon seal (type GSD, for 4″ type TWO), while the thread sealing relies on high-quality teflon (type GD), ensuring leak-free performance and long-lasting durability. This combination delivers a dependable solution for industries requiring secure, efficient, and standards-compliant transfer connections.

List of product variants

Article number	Product variant name	Nominal inner diameter	Working pressure [bar]
TW-MKV-050-SS	Sealing ring TW 1502 with 2" BSP thread, AISI 316	-	16
TW-MKV-050-SSR	Sealing ring TW 1502 with 2" BSP thread, AISI 316	-	16
TW-MKV-080-SS	Sealing ring TW 502 with 3" BSP thread, AISI 316	-	16
TW-MKV-080-SSR	Sealing ring TW 502 with 3" BSP thread, AISI 316	-	16

The MKV sealing ring with BSP internal thread is a precision-engineered component designed for TW transfer connections, working in combination with the MKH closing ring to create a secure and reliable MK connection. Manufactured in compliance with EN ISO 14420-6 (formerly DIN 28450), it ensures consistent performance and safety across a wide range of applications. Crafted from durable AISI 316 stainless steel, the ring offers excellent resistance to corrosion and demanding operating conditions. Suitable for transferring liquids, bulk materials, and gases (excluding liquefied gas and steam), it operates effectively within a pressure range of -0.8 bar to 16 bar and a temperature spectrum from -20°C to +65°C, depending on the medium and sealing material. The joint sealing is provided by a robust hypalon seal (type GSD, for 4″ type TWO), while the thread sealing relies on high-quality teflon (type GD), ensuring leak-free performance and long-lasting durability. This combination delivers a dependable solution for industries requiring secure, efficient, and standards-compliant transfer connections.